-al -er a-a a-c aaa aac aae aaf aag aal aan aar ac- aca acc ace acf acg acl acn acr aea aec aee aef aeg ael aen aer af- afa afc afe aff afg afl afn afr ag- aga agc age agf agg agl agn agr al- ala alc ale alf alg all aln alr an- ana anc ane anf ang anl ann anr ar- ara arc are arf arg arl arn arr c-- caa cac cae caf cag cal can car cca ccc cce ccf ccg ccl ccn ccr ce- cea cec cee cef ceg cel cen cer cfa cfc cfe cff cfg cfl cfn cfr cga cgc cge cgg cgl cgn cgr cl- cla clc cle clf clg cll cln clr cn- cna cnc cne cnf cng cnl cnn cnr cra crc cre crf crg crl crn crr eaa eac eae eaf eag eal ean ear ec- eca ecc ece ecf ecg ecl ecn ecr eea eec eee eef eeg eel een eer ef- efa efc efe eff efg efl efr ega egc ege egf egg egl egn egr ela elc ele elf elg ell eln elr en- ena enc ene enf eng enl enn enr era erc ere erf erg erl ern err faa fac fae faf fag fal fan far fca fcc fce fcf fcg fcl fcn fcr fea fec fee fef feg fel fen fer ffa ffc ffe fff ffg ffl ffn ffr fga fgc fge fgf fgg fgl fgn fgr fla flc fle flf flg fll fln flr fna fnc fne fnf fng fnl fnn fnr fra frc fre frf frg frl frn frr gaa gac gae gaf gag gal gan gar gca gcc gce gcf gcg gcl gcn gcr ge- gea gec gee gef geg gel gen ger gfa gfc gfe gff gfl gfr gga ggc ggg ggn ggr gla glc gle glf glg gll gln glr gna gnc gne gnf gnl gnn gnr gra grc gre grf grg grl grn grr la- laa lac lae laf lag lal lan lar lca lcc lce lcf lcg lcl lcn lcr lea lec lee lef leg lel len ler lfa lfc lfe lff lfg lfl lfn lfr lga lgc lge lgf lgg lgl lgn lgr lla llc lle llf llg lll lln llr lna lnc lne lng lnl lnn lnr lra lrc lrf lrg lrn lrr naa nac nae naf nag nal nan nar nca ncc nce ncf ncg ncl ncn ncr ne- nea nec nee nef neg nel nen ner nfa nfc nfe nff nfl nfn nfr nga ngc nge ngf ngg ngl ngn nla nlc nle nlf nlg nll nln nlr nna nnc nne nnf nng nnl nnn nra nrc nre nrf nrg nrl nrn nrr ra- raa rac rae raf rag ral ran rar rca rcc rce rcf rcg rcl rcn rcr re- rea rec ree ref reg rel ren rer rfa rfc rfe rff rfg rfl rfn rfr rga rgc rge rgf rgg rgn rgr rla rlc rle rlf rlg rll rln rlr rna rnc rng rnn rnr rra rrc rrf rrg rrl rrn rrr